/*******************************************************************************
 * Copyright (c) 2009 Angelo Zerr and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
 *******************************************************************************/
package org.eclipse.e4.ui.css.swt.dom;

import org.eclipse.e4.ui.css.core.dom.CSSStylableElement;
import org.eclipse.e4.ui.css.core.engine.CSSEngine;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.widgets.Scale;

/**
 * {@link CSSStylableElement} implementation which wrap SWT {@link Scale}.
 * 
 */
public class ScaleElement extends ControlElement {
	
	private SelectionListener selectionListener = new SelectionAdapter() {
		public void widgetSelected(SelectionEvent e) {
			doApplyStyles();
		}
	};

	public ScaleElement(Scale scale, CSSEngine engine) {
		super(scale, engine);
	}

	public void initialize() {
		super.initialize();

		if (!dynamicEnabled) return; 
		
		Scale scale = getScale();
		scale.addSelectionListener(selectionListener);
	}
		
	public void dispose() {	
		super.dispose();
		
		if (!dynamicEnabled) return; 
		
		Scale scale = getScale();
		if (!scale.isDisposed()) {
			scale.removeSelectionListener(selectionListener);
		}
	}

	public String getAttribute(String attr) {
		return super.getAttribute(attr);
	}

	protected Scale getScale() {
		return (Scale) getNativeWidget();
	}
}
